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Edit this profileAt a glance
- 21034 Woodfield Rd, Gaithersburg, MD 20882
About John Mccarthy
Listed in the NPI registry as a nurse practitioner — family, John McCarthy, CRNP practices in Gaithersburg, MD. According to Medicare claims data, John cared for 482 Medicare patients across 528 services. The services billed most often include established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes, and annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit. NPI 1952814634 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (301) 509-4150
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
21034 WOODFIELD RD
Gaithersburg, MD 20882
Conditions and Services Within This Provider's Scope
Within Nurse Practitioner - Family generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Allergies
Allergy & skin
Blood disorders
Bone & joint
Dermatology
Digestive
Digestive health
Eye conditions
Heart health
Hormones & endocrine
Infections
Men's health
Mental health
Metabolic & weight
Nerve & joint
Nerve & spine
Neurological
Pain
Pain & spine
Pediatric infections
Respiratory
Skin
Sleep
Urinary health
Women's health
Procedures & services
Chronic condition care
Dermatology
Diagnostic screening
Evaluation & Testing
Hormones & endocrine
Injury care
Lab tests
- COVID-19 testing
- Cholesterol screening
- Hemoglobin A1c Test
- Rapid strep testing
- Thyroid Blood Test
- Urine Drug Screen
Mental health
Minor procedures
- Burn and Wound Care
- Superficial foreign-body removal
- Incision and drainage of an abscess
- Ingrown toenail removal
Minor surgery
Physical exams
Prescriptions
Preventative care
Preventative exams
Sexual health
Skin procedures
Sleep
Urgent care
Weight management
Women's health
- IUD insertion and removal
- Pregnancy Confirmation Test
- Birth control counseling
- Contraceptive implant insertion and removal
- Pap smear
- Well-woman exam
Most searched procedures
Allergies
Diagnostic tests
Ear, nose & throat
Heart health
- EKG
Injections
Lifestyle counseling
Neurological care
Occupational health
Pain management
Respiratory care
Screenings
Procedures Most Often Billed to Medicare
528 services · 482 patients · 10 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
17 | Less often than most peers in Nurse Practitioner, Family |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
117 | More often than most peers in Nurse Practitioner, Family |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
103 | More often than most peers in Nurse Practitioner, Family |
| Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | Billing code | G0439 |
88 | More often than most peers in Nurse Practitioner, Family |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
69 | More often than most peers in Nurse Practitioner, Family |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
59 | As often as other peers in Nurse Practitioner, Family |
| Hospital discharge day management, more than 30 minutes | Office visit | 99239 |
31 | As often as other peers in Nurse Practitioner, Family |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
17 | Less often than most peers in Nurse Practitioner, Family |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
15 | Less often than most peers in Nurse Practitioner, Family |
| Hemoglobin a1c level | Lab test | 83036 |
12 | Less often than most peers in Nurse Practitioner, Family |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other nurse practitioners in Gaithersburg 8
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2013 at Other 7
Providers who graduated from the same medical school in the same year.
More connections — 8 related providers in 1 group
Also performs Insertion of needle into vein for collection of blood sample 8
Providers in MD who bill this service to Medicare most often.
Common questions
What does John McCarthy specialize in?
John McCarthy is a nurse practitioner in Gaithersburg, MD. That is the designation recorded for this NPI in the federal registry, where it is listed as “Nurse Practitioner — Family”.
NPI registry
Where is John McCarthy located?
John McCarthy is listed at 21034 Woodfield Rd, Gaithersburg, MD 20882. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is John McCarthy's phone number?
The number on file is (301) 509-4150. Contact the office directly to confirm availability and scheduling.
NPI registry
What is John McCarthy's NPI number?
John McCarthy's National Provider Identifier is 1952814634. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did John McCarthy train?
John McCarthy attended Other, graduating in 2013. This comes from the CMS National Downloadable File.
CMS public data
How long has John McCarthy been practicing?
John McCarthy has 13 years experience. Calculated from a graduation year of 2013, reported in the CMS National Downloadable File.
CMS public data
What does John McCarthy do most often?
According to Medicare billing data, John McCarthy performs procedures including insertion of needle into vein for collection of blood sample, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has John McCarthy confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by John McCarthy. If this is you, claiming it is free.
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